Will online poker shut down for US players? Quick answer...NO
I believe eventually it will get sorted out in favor of american players, I don't personally think there is enough being done by the pros, they have a lot of fans and a lot of people who would take notice of them if they would get involved more.
I think the big point is to come to an agreement that poker is a game of skill, once that is proved there shouldn't be any problem. Some states ban online poker because it is "gambling" a "game of chance/luck". Once you prove it's a game of skill they would have to lift the ban for online poker.
I saw an argument posted a while ago about a case where the judge stated something like "at the end of the day you can't turn a deuce into an ace". That's the worst statement/argument i've ever heard. It's like saying you can't turn a football into a touchdown/goal, it's how you play it.
Quickest way to get online poker reinstated into the US is to get some televised programs showing that it is in fact a game of skill not luck.